Mesa (master): ac: add support for gl_HelperInvocation

[Timothy Arceri]

Module: Mesa
Branch: master
Commit: 271067967ae24d0fc6deb96821824b2fc19cf2c8
URL:    
http://cgit.freedesktop.org/mesa/mesa/commit/?id=271067967ae24d0fc6deb96821824b2fc19cf2c8

Author: Timothy Arceri <tarc...@itsqueeze.com>
Date:   Fri Jan 19 10:04:26 2018 +1100

ac: add support for gl_HelperInvocation

Reviewed-by: Nicolai Hähnle <nicolai.haeh...@amd.com>

---

 src/amd/common/ac_nir_to_llvm.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c
index 1e592db57a..b90c31320c 100644
--- a/src/amd/common/ac_nir_to_llvm.c
+++ b/src/amd/common/ac_nir_to_llvm.c
@@ -3916,6 +3916,17 @@ static void emit_discard(struct ac_nir_context *ctx,
 }
 
 static LLVMValueRef
+visit_load_helper_invocation(struct ac_nir_context *ctx)
+{
+       LLVMValueRef result = ac_build_intrinsic(&ctx->ac,
+                                                "llvm.amdgcn.ps.live",
+                                                ctx->ac.i1, NULL, 0,
+                                                AC_FUNC_ATTR_READNONE);
+       result = LLVMBuildNot(ctx->ac.builder, result, "");
+       return LLVMBuildSExt(ctx->ac.builder, result, ctx->ac.i32, "");
+}
+
+static LLVMValueRef
 visit_load_local_invocation_index(struct nir_to_llvm_context *ctx)
 {
        LLVMValueRef result;
@@ -4354,6 +4365,9 @@ static void visit_intrinsic(struct ac_nir_context *ctx,
        case nir_intrinsic_load_front_face:
                result = ctx->abi->front_face;
                break;
+       case nir_intrinsic_load_helper_invocation:
+               result = visit_load_helper_invocation(ctx);
+               break;
        case nir_intrinsic_load_instance_id:
                result = ctx->abi->instance_id;
                break;

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